机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]
• 西安光学精密机械研究... [1]
• 国家授时中心 [1]
• 紫金山天文台 [1]

采集方式

• OAI收割 [5]

内容类型

• 会议论文 [3]
• 期刊论文 [2]

发表日期

• 2019 [1]
• 2017 [1]
• 2010 [1]
• 2008 [1]
• 2003 [1]

学科主题

• Optics [2]

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 A Frequency Multiplication Method Based on Extracting Harmonic From Narrow Pulse 期刊论文  OAI收割 IEEE ACCESS, 2019, 卷号: 7, 页码: 95341-95350 作者:  Zhou, Mei;  Tang, Sheng;  Wang, Wenli;  Ke, Jing;  Deng, Zhouhu   |  收藏  |  浏览/下载：25/0  |  提交时间：2021/11/29 Frequency multiplication  narrow pulse  filter  stability  accuracy   A Design of High-precision BLDCM Drive with Bus Voltage Protection 会议论文  OAI收割 Changchun, PEOPLES R CHINA, 2017-07-23 作者:  Lian Xuezheng(廉学正);  Wang Haitao(王海涛);  Xie Meilin(谢梅林);  Huang Wei(黄伟);  Li Dawei(李大伟)   |  收藏  |  浏览/下载：29/0  |  提交时间：2018/03/28 Frequency Multiplication  Bus Voltage Protection  Balance Wheel  Bldc Motor Drive   New phase measurement method for laser rangefinder (EI CONFERENCE) 会议论文  OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者:  Meng Z.;  Meng Z. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 A new phase measurement method is designed and presented by using the technique of signal shifting phase and the technique of signal multiplication for laser rangefinder. The intensity of laser light is modulated by cosine circuit signal  at the same time the cosine circuit signal is thansformed sine signal by the shifting phase technique. Two signals mentioned above are multiplied by received signal from the target respectively  then being transmitted into signal processor after passing through low band filter respectively. The result of phase-shift between the received signal and sent signal is calculated by means of signal processor and time-counter with double frequency of modulation signal. The proposed system is composed of four units such as control and count unit  emitting and receiving unit of laser light  signal processing unit and result display unit. The two most advantages of proposed system over others are its ability of proper isolation which reduces crosstalk and its independency thermal drift. Theoretical calculations and experimental results have shown the accuracy better than 2 mm. 2010 Copyright SPIE - The International Society for Optical Engineering.   Realization of a communication experiment at 500-GHz band - art. no. 68401A 期刊论文  OAI收割 TERAHERTZ PHOTONICS  PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), 2008, 卷号: 6840, 页码: A8401-A8401 Chen Wei-Ming; Li Jing; Shen Xiao-Fang 收藏  |  浏览/下载：16/0  |  提交时间：2011/12/29 communication  submillimeter-wave  SIS receiver  frequency modulation  frequency multiplication   Uncertainty analysis on the water resource system in water-supply zone of Tarim River Watershed: Based on the multiplication frequency curve type III(X-III2) 会议论文  OAI收割 Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie) Li X. Y.; Yang L. X.; Wang L. X. 收藏  |  浏览/下载：16/0  |  提交时间：2012/06/30 Tarim River Watershed  hydrological & water resource system  uncertainty  Multiplication Frequency Curve Type  analog simulation of  hydrological data